WebToolKit - website which contains useful free scripts and information for web developers. All scripts posted here are tested and used by many people, they all are improved or writen from scratch. They all are released under the MIT License.

JavaScript tutor was built with beginners in mind.
This tutorial contains beginner or intermediate material for the most part. You will, by no means, be perfect at javascript when you finish this tutorial. However, you will have a solid background in javascript and ready to learn advanced material.